Survey of "in and out surgery"-first year.
D000553:Ambulatory Care / Q000706:statistics & numerical data*; D004219:District of Columbia; D006306:Health Surveys; D008505:Medical Staff, Hospital; D011182:Postoperative Care; D011183:Postoperative Complications; D011300:Preoperative Care; D013514:Surgical Procedures, Operative / Q000706:statistics & numerical data*